Borders stores may be in short supply these days, but their online store is still around, and for the next four days you can get 50% off the list price of any one item. You just need a Borders Rewards membership, which is free to sign up for. You can also grab free shipping on any purchase over $25. Exclusions apply, but the site doesn't say—so head over to Borders.com and enter the coupon code BLP2566Y to see what you can get. The coupon expires May 23. [via SlickDeals]